The method of inductively coupled plasma-mass spectrometry for determination of impurities of 30 trace rare earth and non-rare earth elements in high purity ytterbium oxide was studied.

Recently, high-purity aluminum oxide has been widely used as translucent ceramic materials, single crystal materials and rare earth fluorescent materials because of its mechanical, thermal, chemical properties.

Active brazing of high purity alumina to niobium metal;

It is also introduced that the production method of high purity alumina.

Preparation of high-purity magnesium oxide from serpentine;

Study on preparation of high-purity magnesium oxide;

Study on the determination of ferric oxide in high-purity alumina by extractive spectrophotometry combined with microwave digestion;

The high-purity alumina (≥ 99.

Study on new technology of the co-production of high purity magnesium oxide and anhydrous sodium sulfate;

The author introduced the status of production technology of high purity magnesium oxide,emphasizing on circulation process of ammonium salt,analyzed the possibility adopting the technology to produce high purity magnesium oxide in chemical fertilizer plant and market prospect.

The development of activated magnesium oxide, fused magnesium oxide, silicon- steel magnesium oxide, and high purity magnesium oxide etc is successful.